变刚度调平设计在构造物连接与过渡段中的应用

依托江苏省某新建高速公路,针对小型构造物与两端连接路段的连接以及连接路段与一般路段间的局部差异沉降控制问题开展研究.基于概念设计中变刚度调平的理念,提出降低小型构造物的基础加固刚度,提高两侧连接段的加固刚度的方案,并比较桩间距3.5mPTC管桩复合地基处理过渡段与刚柔性组合桩复合地基处理过渡段的效果.结果表明,后者更加有利于构造物连接段与一般路段连接处局部差异沉降协调过渡.

Application of Variable Rigidity Design at Connection Section and Transitional Section of Road Structure

Based on a new highway in Jiangsu Province, local control of differential settlement which oc- curred at junction between structures and the connection section at junction between the connection section and the general road are studied in this paper. Based on the variable rigidity design of conceptual design, the rein- forcement program of reducing the structure foundation stiffness and improving the connection section foundation stiffness is proposed, and the 3.5m pile spacing pile composite foundation treatment effect and rigid and flexible composite foundation treatment effect are compared. The results show that the latter is more conducive to the co- ordination transition.